Fire extinguishing nozzle



arch l, 1938. l.. JARvIs FIRE EXTINGUISHING NOZZLE Filed April 16, 1936Patented Mar. 1, 1938 2 Claims.

My invention relates to nozzles and particularly to re extinguishingnozzles.

It is well known that ordinary nozzles for fire hose are designed with astraight bore coaxial with the hose to which the nozzle is connected sothat the stream of Water issuing therefrom is, at least initially,substantially coaxial with the hose. Due to the high water pressureemployed, the hose line is so hard and inflexible that it is quiteimpossible to bend or curve it except in an arc of comparatively longradius.

Due to the impossibility of bending or exing the hose and also due tothe strong reaction or kick back of the issuing water, it is impossiblefor remen handling hose from a ladder to throw a stream of water througha window except substantially in a straight ahead direction.

It is frequently desirable to throw the water at right angles to thegeneral nozzle and hose line or even in a backward direction in order toextinguish the fire. This is quite impossible with the present nozzlesand, due to the reaction of the issuing stream which is always in adirection opposite to the direction in which the stream is issuing, itis not very practical to have a nozzle provided say with a ball andsocket joint and which can be turned in substantially all directions.

The principal object of my invention is to provide a nozzle which willthrow water backwards, sidewise and forward at an angle to the axis ofthe nozzle and in which the reactions due to the issuing Wate-r aresubstantially balanced. Another object is to provide a nozzle of thischaracter of simple construction and which may be readily assembled ordisassembled.

With these objects in View, my invention includes the novel elements andthe combinations and arrangements thereof described below andillustrated in the accompanying drawing in which- Fig. 1 is an elevationview of an extension element adapted to be screwed directly onto thehose;

Fig. 2 is an elevation view of a nozzle element adapted to be threadedonto the end of the extension element shown in Fig. 1;

Fig. 3 is a bottom plan View of Fig. 2;

Fig. 4 is a plan view of a screw cap or plug adapted to close the upperend of the element shown in Fig. 2;

Fig. 5 is an elevation View, partially in section, of the plug shown inFig. 4;

Fig. 6 is a plan View of a hollow perforated sphere, partly broken away,through which the water is discharged;

Fig. 7 is an elevation view, partially in section, of the sphere;

Fig. 8 is a plan view of a guard adapted to surround the sphere inspaced relation thereto;

Fig. 9 is an elevation view of the guard, partially in section;

Fig. 10 is a bottom View of the guard; and

Fig. 11 is an elevation View, partially in section, of the nozzleassembly.

Referring to the drawing, I represents a hollow tubular elementinternally threaded as shown at 2 whereby it is adapted to be screwedonto the end of a fire hose. In order that a tight joint may be formed,the exterior of the tubular element is provided with projections 3adapted to receive a special wrench or Spanner for tightening orloosening the joint. The other end of the tubular element is exteriorlythreaded as shown at 4.

In Fig. 2, I have shown a hollow tubular element 5 interiorly threadedat one end 6 to cooperate with the external threads 4 on element Iwhereby the two may be coupled together. In order to form a tight jointhere the element 5 is provided with external projections 'I adapted toreceive a special wrench or Spanner. At the other end the element 5 isinteriorly threaded as shown at 8 to receive the threaded stem portion 9of the plug IB which serves to close the tubular element 5 and also tosecure other elements of the nozzle to the element 5 in assembledrelation. The element 5 is provided with a plurality of lateral openingsI I adapted to permit water to be discharged therethrough. 'I'hatportion of the element ii having the lateral openings II therein is ofsomewhat smaller diameter than the base portion I2 in order to provide ashoulder I3 which forms a bearing upon which the sphere I4 is adapted torevolve. The sphere I4 is hollow and provided at the top and bottom withopenings I5 and I6 respectively adapted to permit it to be slipped overthe perforated portion of the element 5. The openings I5 and I6 have arunning fit with the exterior surface of the element 5 so that thesphere I i may rotate freely about the axis of the element 5. When thesphere I4 is positioned over the element 5, the cap or plug IB isscrewed into place and the head I1 of element I0 retains the parts inassembled relation. It is to be understood that when the plug I0 isscrewed into place the sphere I4 has a running fit between the shoulderI3 and the head I'I of element I Il.

The hollow sphere I4 is provided with a plurality of circular openingsI8 preferably disposed in lines or zones as shown in Figs. 6 and 7.These openings are not drilled in a direction radially of sphere I4 butat an angle to the radius of the sphere passing through the center ofthe opening so that the reaction of the Water in issuing therefrom tendsto rotate the sphere.

In order to protect the sphere I4, I surround it by the guard elementindicated generally at I9 in Figs. 8, 9 and 10. This guard comprises aplurality of curved bars 20 adapted to surround the sphere and be spacedsomewhat therefrom. The bars 8 are cast integral with semi-circulardiscs 2l and 22 at the top and with semi-cylindrical collars 23 and 24at the bottom. In other words, the guard I9 is madein two parts in orderthat it may be assembled about the sphere. Disc 2I is provided with anopening 25 adapted to permit a screw to be passed therethrough and intothe threaded opening 26 in plug I0. The opening 2'I in disc 22 functionssimilarly to receive a screw cooperating with the threaded opening 28Vin plug Ill. The semi-cylindrical collars 23 and 24 at the bottom of theguard are secured together by clamp screws 29 and 3U, it beingunderstood that the collars 23 and 24 are clamped about the base of theelement 5.

It will be notedthat the openings I8 in sphere I4 extend from the top tothe bottom so that water issuing therefrom is not only thrown ahead ofthe nozzle but also in a backwards direction toward the hose line. Thus,where the interior of the front Wall of a building is burning the nozzlemay be thrust through a window and water will be directed inV a backwarddirection from the nozzle against the burning Wall. The reaction of theissuing water causes the sphere to revolve and since the water isissuing substantially in all directions at the same time, the reactionscreated by the issuing jets are substantially balanced. Moreover, byrotating the sphere, thewater is discharged in sheet form instead of ina plurality of separate streams or jets so that every spot within rangethereof is wet directly without moving the nozzle and independent ofthespacing of the openings in the sphere circumferentially of the axis ofrotation.

What I claim is:

y1. A nozzle for a fire hose comprising a tubular element adapted to besecured to said hose and having water discharge openings in the sidethereof, a hollow spherical element rotatably mounted on said tubularelement and surrounding said discharge openings whereby water isdischarged therefrom into said sphere, and a stationary guard elementsecured to said tubular element and surrounding said sphere in spacedrelation thereto; said sphere being provided with a plurality ofdischarge openings therein so constructed and arranged that the reactionof water issuing therefrom will rotate said sphere, and so disposed thatwater will be discharged backwardly in the direction of said hose and tothe sides thereof.

2. A nozzle for a lire hose comprising a tubular element adapted to besecured to said hose and having water discharge openings in the sidethereof, a hollow spherical element rotatably mounted on said tubularelement and surrounding said discharge openings whereby water isdischarged therefrom into said sphere; said sphere being provided with aplurality of discharge openings therein so constructed and arranged thatjets of water will be discharged therefrom in substantially alldirections and rotate said spherical element whereby the reactions ofsaid jets will be substantially balanced, and said nozzle when thrustthrough a window of a burning building will discharge substantiallycontinuous sheets of Water backwardly against the wall of said buildingabout said window.

LEO J ARVIS.

